Collections

we know that String Class is Fix class , that is complex to edit, add to it and remove from it , and if you need to do advence process like sort or search , then it will take good number of code.

but in jave there is class called Collections it can reduce that effort ..

here is some simple examples of how to use that class to manipulate String easily

import java.util.*; // <- this must be included

  public class TheMain {

  public static void main(String[] args) {

    ///
    System.out.println("\n");


    // names
    String Names[] =
    {"Programmer1","Hamad","Samer","Rami","Fahd","Abdullah","Saad","Omar" };

    List list; // <- this is our new class


    // print the String
    System.out.print("The String Names: ");
    for(int i = 0; i < Names.length; i ++)
    {System.out.print(" "+Names);}

    // copy String to list
    list = new ArrayList(Arrays.asList(Names));

    // print the List
    System.out.println("The List list: "+ list);

    //sort the list (Increment sorting)
    Collections.sort(list);
    System.out.println("The List After sort: "+list);

    // rearrange the list randomly
    Collections.shuffle(list);
    System.out.println("The List After shuffle: "+list);

   //find the max and min
   System.out.println("\tThe Max Name is: "+Collections.max(list));
   //find the Min and min
   System.out.println("\tThe Min Name is: "+Collections.min(list));

   // search
   System.out.println("The Index of \"Samer\" in list is: "+Collections.binarySearch(list,"Samer"));
   System.out.println("The Index of \"Programmer1\" in list is: "+Collections.binarySearch(list,"Programmer1"));
   System.out.print("The Index of \"Ahmed\" in list is: "+Collections.binarySearch(list,"Ahmed"));
   System.out.println("  if index = -ve 'then not in list' ");

   //insert
   list.add(2,"Ahmed");
   System.out.println("The List After adding 'Ahmed' in the 2nd index: "+list);

   // remove
   list.remove(4);
   System.out.println("The List After removing 4th index: "+list);

   // return back to String
   Names = (String[]) list.toArray(new String[list.size()]);
   System.out.print("The String Names: ");
   for(int i = 0; i < Names.length; i ++)
   {System.out.print(" "+Names);}

    ///


  }//end the main method


}// end TheMain class

and if any question... Just Aske